Improvement in steam-generators



UNITED STATES PATENT OFFICE.

HENRY O. SERGEANT, OF NEW YORK, N. Y.

IMPROVEMENT IN STEAM-GENERATORS.

Specification forming part of-Letters Patent No. 53,493, dated March 27, 1866.

To all 'whom it may concern Be it known that I, HENRY C. SERGEAN'I, of the city and State of New York, have invented -a new and Improved Mode of Gonstructing Steam-Boilers 5 and I do hereby declare that the following is is a full and exact description thereoreference being had to the accompanying drawings, and to the letters of reference marked thereonv The nature of the invention is the arrangement of the tubes in the boiler and the Inode of constructing the tubes to be used s0 as to allow free circulation through the tubes; also, so arranged that they can be cleaned from the outside of the boiler by taking oi' the plug or cap at the outer ends of tubes, and, if found necessary, a new one replaced by merely unscrewing and screwing them into the tluesheet.

To enable others skilled in the art to make and use my invention, l will proceed to describe its construction and operation.

, Figure l is intended to represent a Vertical cross-section of my boiler, showing the back water-leg, steam-dome, lire-flue, and the position the tubes are set. Fig. 2 represents a section ot' one of the tubes, showing the screw at each end and the cap or plug on one end. Fig. 3 shows a cross-section of several tubes, with the position of the partition inside ofthe tubes, and the way they are set iu the iiuesheet, so as to cause the greatest amount of heat to act ou the lower half of the tubes below the partition.

Letter Ais intended to represent the waterleg, which, in a boiler for manufacturing purposes, (used as a stationary boiler,) need not be used only on one side, the other sides being constructed of brick.

B B represent the nest of tubes with one end screwed into the flue-sheet, (shown at H,) the other ends passing out. through the opposite side through a plate of iron with holes through it to correspond with the tubes used. On this end of the tubes is screwed a cap or plug, (shown in Fig. 2 at F.)

Letter D represents the ire-iiue passing out through the steam-dome, (shown at C.) Through this fire-flue passes the otfal from combustion after it has passed through the nest of tubes. v

Letter E represents the partition through the tubes, At the outer end it is about onehalf inch shorter than the tube, so as to allow the water t0 pass, as shown by the arrows in in Fig. 2.

The operations: After the wateris pumped up in the boiler, through the water-leg A, to the desired level, (shown by the dotted line,) the re is started. As the ilame and heat pass up they act With the greatest intensity upon the lower half of the tubes, which causes the water in that halt to become heated first; consequently it passes out into the water-leg, and that which was in the upper half passes down into the lower halt', and the upper halt' is supplied from the water-leg, and so continues the circulation through each tube. One or more fire-dues can be arranged to carry oft' the smoke, &c.

What I claim, and desire to secure by Letters Patent, is

l. A tube with a partition in it, when so arranged that the ire will operate with the greatest intensity on 011e side of the tube, so as to cause a circulation of the water in opposite directions in the tube.

2. The combinations and arrangement of the above-described tubes, with theinclined waterleg and plate for holding the outer ends of tubes in position, substantially as shown and described.

Witnesses:

JNO. EARL, JOHN CURTIS.

HENRY C. SERGEANT. 

